feat: implement command mode

1 files changed, 49 insertions, 3 deletions

diff --git a/src/game/game.hpp b/src/game/game.hpp
index 8363c4d..a35c0ce 100644
--- a/src/game/game.hpp
+++ b/src/game/game.hpp
@@ -14,14 +14,41 @@
 
 #include <chrono>
 #include <cstddef>
+#include <functional>
 #include <list>
 #include <memory>
+#include <optional>
+#include <string>
+#include <string_view>
+#include <vector>
 
 constexpr auto DEFAULT_MIN_TIME_SINCE_LAST_GEN_MILLIS = 200;
 
 constexpr auto MIN_TIME_SINCE_LAST_GEN_INCREMENT = 50;
 constexpr auto MIN_TIME_SINCE_LAST_GEN_DECREMENT = 50;
 
+constexpr auto CURSOR_FALLBACK_POS_X = 10;
+constexpr auto CURSOR_FALLBACK_POS_Y = 10;
+
+constexpr std::string_view ERASE_ENTIRE_LINE = "{esc}[2K";
+constexpr std::string_view ERASE_LINE_FROM_CURSOR = "{esc}[0K";
+
+enum Mode
+{
+	NORMAL,
+	COMMAND
+};
+
+class CommandInfo
+{
+public:
+	using Options = const std::vector<std::string> &;
+	using CommandFunction = std::function<void(Options)>;
+
+	std::size_t option_cnt;
+	CommandFunction function;
+};
+
 class Game : public IGame
 {
 public:
@@ -50,19 +77,38 @@ private:
 	std::shared_ptr<IUserInputObserver> _user_input_observer;
 	std::shared_ptr<ICellHelper> _cell_helper;
 
-	using TimePoint = std::chrono::system_clock::time_point;
+	Mode _current_mode;
 
-	TimePoint _last_update_time;
-	TimePoint _last_gen_update_time;
+	std::optional<Vector2> _last_pos_before_command_mode;
+
+	std::string _command_mode_input;
+
+	std::unordered_map<std::string, CommandInfo> _commands;
+
+	std::chrono::system_clock::time_point _last_gen_update_time;
 
 	int32_t _min_time_since_last_gen_millis = DEFAULT_MIN_TIME_SINCE_LAST_GEN_MILLIS;
 
 	std::list<Vector2> _living_cell_positions;
 
+	void _on_normal_mode_update() noexcept;
+
+	void _on_command_mode_update() noexcept;
+
+	void _return_to_normal_mode() noexcept;
+
+	void _run_command(const std::string &command) noexcept;
+
+	void _show_command_error(const std::string_view &error_message) noexcept;
+
 	auto _move_cursor(const Vector2 &direction) noexcept -> bool;
 
 	void _set_space(
 		const std::shared_ptr<IMatrix<IScene::MatrixElement>> &matrix,
 		const Vector2 &position,
 		char character) noexcept;
+
+	static void _erase_entire_line() noexcept;
+
+	static void _erase_line_from_cursor() noexcept;
 };